89 Yj cooling system - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-28-2012, 06:21 PM   #1
Join Date: Mar 2012
Posts: 2
Cool 89 Yj cooling system

Hello all. Just bought this and had to put new radiator in the second day I drove it. The seam at the bottom started leaking on it. It has a 13 lb cap and seems to have air trapped in the system. Any tricks or advice would be appreciated. Thanks in advance.

Frank1264 is offline   Quote
Old 03-28-2012, 06:24 PM   #2

WF Supporting Member
::WF Administrator::
4Jeepn's Avatar
Join Date: Apr 2005
Location: Florence, KY
Posts: 11,103
just replaced the one in my 95.. no to bad to do.. however in the mean time if you want to get the air out.. as its warming up squeeze and release the top hose again and again and this will help to get the air out. have the cap off during the first few mins.

4Jeepn is offline   Quote
Old 03-28-2012, 06:34 PM   #3
Xpress's Avatar
Join Date: Jan 2011
Location: El Cajon
Posts: 2,585
Pull the thermostat and drill a small pinhole into the flat disk. Orient this pinhole up. Why american car thermostats don't have these bleeder holes is FAR beyond my understanding, every foreign car does though. The small pinhole just allows air to bleed out but doesn't allow a significant amount of coolant to flow to effect anything.

I do this for all of my thermostats if they don't have pinholes.

2.5L Genius of some sort.
Xpress is offline   Quote
Old 03-29-2012, 06:02 PM   #4
Join Date: Mar 2012
Posts: 2
Thank you, I will try both.
Frank1264 is offline   Quote
Old 03-29-2012, 06:15 PM   #5
Cali Smog Nazi.

WF Supporting Member
2xs's Avatar
Join Date: Jun 2011
Location: Santa Rosa, Ca.
Posts: 2,711
Mac Tools Online Store - Air-Evac Radiator Purge & Test System

I use this, it not only lets me fill the cooling system with no air pockets, it lets me check for leaks.
'04 SV1000s:
Old Jeep that was totaled (and SOLD!):
2xs is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
YJ Dash Trade 1989JEEPYJ Classifieds Archive 3 05-04-2012 12:03 AM
Pic Rqst: YJ with Rubi wheels/tires MickeYJ YJ Tech Forum 6 03-29-2012 05:07 PM
YJ Missing tinkerbob YJ Tech Forum 3 03-28-2012 06:25 PM
NJ: 5-speed transmission from a '94 YJ S ourlee Classifieds Archive 0 03-28-2012 09:10 AM
shocks for my yj 87hrhyj Washington Jeep Forum 1 03-28-2012 07:38 AM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:36 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC